With either transmission option, the Elantra is capable of an amazing-for-any-class 38 mpg on the highway. For 2011, the Elantra features a powerful and very efficient engine and a choice of two 6-speed transmissions. Although this 2011 Hyundai Elantra GLS PZEV is technically a pre-owned vehicle, the clean and spotless interior could fool even the toughest critic